<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    console.log(document.cookie);
    document.cookie = 'username=frank ;domain=domain; expires='+new Date('1970-1-1')+'; path=/';
    document.cookie = 'username=tom';
    document.cookie = 'age=19';
    document.cookie = 'gender=a';
</script>
</body>
</html>